Filter or strainer attachment for faucets



R. FRANK. FILTER 0R STRAINER ATTACHMENT FOR FAUCETS.

APPLICATION FILED JAN. 24. 1920.

1,361,976, Patented Dec. 14, 1920.

V *2, Q Q

umrsn STATES PATENT OFFICE.

RALPH FRANK, or MINNEAPOLIS, iz INNEsotrA.

FILTER OR STRAINEB ATTACHMENT FOR FAUCETS.

To all whom it may concern Be it known that I, RALPH FRANK, a citithe following is a specification, reference being had to the accompanying drawings.

This invention relates to an improved filter or strainer attachment for faucets and the like, and an object ofthe invention is to provide an improved, simple, efficient and practical device of this kind, capable of being manufactured for a relatively low cost, and sold at a reasonable profit. H

In addition to affording an improved filter or strainer attachment for faucets, the invention primarily aims to provide means for carrying off the collection of refuse in the filter or strainer, without detaching the filter or strainer from the faucet, and to accomplish this aim, the force of the flow of water from the faucet into the filter or strainer casing is employed. In other words, the force of the stream of water into the casing of the filter drives the refuse from the upper. surface of the filtering screens through a laterally disposed valve element, which is movably' mounted inthe wall of the casing of the filter. The refuse being carried off in this manner to the sink is washed through the drain pipe of the sink by the flow of the water from the faucet. I

The present form of filterand the attachment, for relieving the casing of the filter of the refuse, can be readily employed in connection with the faucet withoutunnecessarily wasting a great amount ofwater, and it is to be noted that the short distance between the outlet end of the faucet and the filtering screens plays an essenial andmost important part in causing the discharge of the refuse, for the reason that the force of the water at such a short distance does not give the. refuse any chance to settle on the filtering screens, when the valve element is opened. I

A still further object of the invention is to provide a self-cleaning adjustable filter, particularly adapted for home use, and which may be readily used on any kind of faucet in a position over the sink.

While the design and construction at present illustrated and set forth is deemed V Specification of Letters Patent.

Application filed January 24,

preferable, it is obvious that as a. r lt f a reducticn of the invention to more. practical form for commercial purposes, the in venti-en may be susceptibleto changes, and the right to these cnanges is claimed, pro 1' led they are comprehended within the scope of what is claimed.

The invention romprises further features and combination of parts, as will be hereinafter set forth, shown in the drawings and claimed.

in the drawings:

igure 1 is a vertical sectional view of a sink, and the self-cleaning adjustable filter applied in elevation to the faucet,

Fig. 2 is an enlarged sectional view tlnough the filter or strainer constructed in accordance with the invention showing the faucet in elevation and illustrating the refuse carrying oli means closed,

Fig. 3 is a view similar to Fig. 2 showing the refuse carrying ofi' means open, and

Fig. a is a detail viewof the valve which is adapted to be opened for permitting the escape of the refuse or sediment.

Referring more especially to the drawings, l designates the casing of the filter or strainer, whicl1 may be constructed of any suitable metal, preferably aluminum, or the like, and which may be any suitable shape, preferably as illustrated. This casing is shown as being cylindrical and slightly tapered, though it may be otherwise shaped, and it has at its lower end an internal annular flange 2 constituting a shoulder 3 for the support of a plurality of thicknesses or plies of wire fabric or screen material of a very fine mesh, as shown. These thicknesses or. layers or plies of wire fabric or screen material t are superim posed, there being preferably five in number, though not necessarily, and to hold them firmly in contact with the shoulder, a pliable sleeve 5 is fitted into the casing. This pliable sleeve may be constructed of any suitable material, preferably rubber or the like, and may be held in the casing in any conventional manner, preferably by frictional contact with the wall of the casing. Very often in devices of this character, the sleeve is held in the casing by means of threads, though in the present application no such construction is illustrated.

The upper end of the sleeve has an internal annular flange 6, which is of considerable thickness, sufiicient to firmly contact with the cylindrical surface of the fa-ucet'7, to which the filter or strainer is applied. The opening 8, caused to be formed by the provi sion of the flange 6 is preferably of a smaller diameter than the diameter of the casin of the faucet. thereb Y requirin a cerb I n 23 tain amount of pressure or force to cause the opening to fit or telescopically receive the faucet, and thereby causing the flange to. frictionally hug'the faucet to hold the casing of the filter to the faucet.

' The casing 1 has an extension 9 provided with an opening 10, which receives a pin valve 11. The inner end of the opening 10 of the extension 9 adjacent the inner surface of the casing 1 has a beveled countersink 12. The pin valve has a valve head 13,

' which is beveled, and is adapted to seat in the beveled counter-sink 12, which constitutes a valve seat. 'VVhile the valve head 13 is carried by the pin vale, it is. to be noted that it is capable of being detached, the same being connected to the pin valve by means of the threaded extension 14. This threaded extension is caused to firmly engage into the pm valve by wedglng or tightly fitting the threads, by applying considerable force to the valve head. The rubber sleeve which is mounted in the casing at a point adjacent the wire fabric filtering disks, is provided with an opening 15, the wall of which is beveled correspondingly to the valve and countersink or valve seat 12, and is adapted to be engaged by the valve head of the pin valve. When the pin valve is closed and the valve head is in contact with the countersink and the beveled opening, the force of the water into the'casing of the filterer, aids materially in holding'the valve head in contact with its seat, thereby preventing the escape of water during the filtering process. By means of the valve head contacting with the'beveled opening of the rubber sleeve. a tight fit of the valve head is afforded.

The pin valve at a point substantially between its ends, is provided with an elongated cut away portion 17, andthe part 17 of the 7' pin valve, between the shoulders l 8 at the opposite ends of the cut away portion is seml-clrcular 1n cross section. The pin valve 1s'prov1ded with a transverse dowel pin 19, which contacts with the end of the extension 9 to. limit the inward movement of the pin valve, when it is in open position. The end of the extension 9 is provided with diametrically opposite semi-circular recesses 20 to receive the dowel pin, to prevent the pin valve from rotating when it is open, and to 'hold the pin valve so that its cut away portion will open downwardly, whereby the discharge of water together with the refuse will be in a downward direction rather than laterally or upwardly.

j Ordinarily the pin valve is closed, and obviously whenever the valve cock of the fauvalve.

cet'i's opened, the water will flow through V the casing 1 andbe'filtered or strained by the wire fabric disks. It has been found that quite a bit of sediment collects on the filtering or screen elements, therefore, the aim of the present invention is; to provide suitable Lmeans to cause the removal of the sediment, hence the provision of the pin During the usual filtering process of the water, as previously stated, the'valve head of the pinvalVe is normally closed. However, when it isdesired to cause the removal of the sediment, the pin valve may be moved inwardly unseating the valve head,

and causing the transverse pin 19 to engage the semi-circular recesses 20, therefore, it will be observed that the cut away portlon 17 will be positioned'far enough inwardly ofthe casing 1 as to permit the force of tl e .waterto 'carry ofi the sediment throughthe opening 10, for the cut awayportion 17 extends beyond the opening 10 ateach end. In fact, the water will pass'out through the cut away portion 17, and'owing to the portion facing downward, the water and the sediment will be discharged in a downward direction into the sink.

VVhen'the pin valve is closed and the watre is allowed to pass from the faucet, by opening the valve cook, the non-purified water is prevented from passing through the filtering elements, and since the valve head makesa close join with the valve seat, the p heretofore collected, and then the pin valve can bejclosed, after which theproperly fi1-- tered water is usable; In fact, if desired, the pin valve may be allowed to remain open, while the water which is being filtered is received in a container for use. In such an instance,-the sednnent as it collects when the, water 1s allowed to flow, is automatically removed, owing to the pin valve being open. As there is not very much space between the lower end of the faucet and the uppermost filtering element, there is not 1 very much chance for outside dirt to collect. V7

The pin valve 11 adjacent the cut away portion is provided with opposite flanges 11*, there being a space between theflanges to engage the bottom of the opening 10, when the pin valve isopen, thereby prevent ing the pin valve from sagging. When. the

Cir

pin valve is open, the valve head 13 will scrape over the upper face of the uppermost filtering member, thereby dislodging the sediment that may collect thereon.

The invention having been set forth, what is claimed as new and useful is 1. In a device for carrying off the refuse from a lilter which is provided with a filtering member, the combination with a casing, the wall of which having a transverse outlet opening for the refuse, of means mounted in theopening for closing the same, said means having a device at one end engaging one end of said opening to additionally close the opening, saiddevice adapted to move across the filtering member for dislodging the refuse, whereby it may be discharged through the opening when said means is open, said means having cut away portion adapted to register with the wall of the opening when the means is open, to permit of the discharge of the refuse.

2. In a device for carrying ofi refuse from a filter, the combination with a casing including a filtering member, said casing having a lateral opening in its wall, means mounted in the opening adapted to close and open the same, said means having a device at one end for sliding over the surface of the li tering member for dislodging the refuse, whereby it may be carried off when the opening is open.

3. 111 a device for carrying off refuse, a filter, casing provided with a lateral opening in its wall, one end of the opening having a valve seat, a valve engaging said seat, a stem provided in the opening, said stem having a cut away part adapted to register with the wall of the opening when the'valve is pushed inwardly to permit of the discharge of the refuse from the casing, said valve adapted .to scrape over the surface of filtering member in the casing for dislodging therefuse to permit it to be carried off.

-i. In a device for carrying off the refuse from a filter, a casing having an opening in wall, one end of the opening having a valve seat, a valve operatively engaging said seat, a stem for the valve guided in the epening, the marginal edge of one end of the opening having notches, said stem having an elon ated cut away portion registerwith the wall of the opening, when the stem and valve are pushed inwardly to permit the discharge of the refuse, said valve ada ted to scrape over the surface of the lcering member in the filter for dislodging i refuse to permit it to be carried off, and means carried by the stem to engage said notches to prevent rotation of the stem when the stem and valve are pushed inwardly.

In testimony whereof I hereunto affix my signature.

RALPH FRANK. 

